Across
1
Blocking of light by a celestial body
4
Reddish electrical conductor
5
Element found in all living things
7
Basic unit of life
9
Curved glass that refracts light
11
Unit of electric potential
Down
2
Unit of force
3
Measure of matter in an object
6
Mass per unit volume
7
Solid with repeating atomic pattern
8
Our home planet
10
Unit of energy